They are based on the Tech-Ed Visual Studio demonstration video. In one moment the presenter opens a SharePoint portal but it’s 2010 pre-beta version, according to the look & feel. Usually Microsoft keeps the same UI as the previous version before the public beta.
Basically, it’s a MOSS 2007 look with a red “Give Feedback” button and sexy AJAX inline list editing, skipping the edit forms and datasheet control. Cool!
More details at Lee Richardon’s site.